On a distant planet a freely falling object has an acceleration of 20 m/s2. Calculate the speed that an object dropped from rest on this planet acquires in 1.5s.

How far distant is the "distant planet"?

My book doesn't say how distant the planet is.

Then I think this applies - Ask Me Help Desk - Announcements in Forum : Homework Help (https://www.askmehelpdesk.com/math-sciences/announcement-font-color-ff0000-u-b-read-first-expectations-homework-help-board-b-u-font.html)
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I think the equation is v=gt(g=10m/s2). But I am not sure about where the numbers go.